diff --git a/src/rigol_dho_lib/rigol.py b/src/rigol_dho_lib/rigol.py
index 230b09e..0a4d498 100644
--- a/src/rigol_dho_lib/rigol.py
+++ b/src/rigol_dho_lib/rigol.py
@@ -26,7 +26,7 @@ class Channel:
         self.scale_V = 5
 
         self.setProbe(self.probe)
-        # self.setVScale(self.scale_V)
+        self.setVScale(self.scale_V)
 
         self.last_scale = 1  # V/div
 
@@ -129,8 +129,8 @@ class Channel:
     def clampVscale(self, val):
         if val > 100:
             val = 100
-        if val < 0.0001:
-            val = 0.0001
+        if val < 0.01:
+            val = 0.01
         return val
 
     def getSpan(self):  # display the difference between min and max voltage in dump